CN110299700A - A kind of electro-mechanical mixed dc circuit breaker and its control method - Google Patents
A kind of electro-mechanical mixed dc circuit breaker and its control method Download PDFInfo
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- CN110299700A CN110299700A CN201910509359.4A CN201910509359A CN110299700A CN 110299700 A CN110299700 A CN 110299700A CN 201910509359 A CN201910509359 A CN 201910509359A CN 110299700 A CN110299700 A CN 110299700A
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
- H01H9/541—Contacts shunted by semiconductor devices
- H01H9/542—Contacts shunted by static switch means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
- H01H9/547—Combinations of mechanical switches and static switches, the latter being controlled by the former
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/268—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for dc systems
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
- H01H9/541—Contacts shunted by semiconductor devices
- H01H9/542—Contacts shunted by static switch means
- H01H2009/543—Contacts shunted by static switch means third parallel branch comprising an energy absorber, e.g. MOV, PTC, Zener
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
- H01H9/541—Contacts shunted by semiconductor devices
- H01H9/542—Contacts shunted by static switch means
- H01H2009/544—Contacts shunted by static switch means the static switching means being an insulated gate bipolar transistor, e.g. IGBT, Darlington configuration of FET and bipolar transistor
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- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The present invention provides a kind of electro-mechanical mixed dc circuit breaker and its control methods, comprising: major flow branch, cutout branch and change of current branch.The electro-mechanical mixed dc circuit breaker, in the normal on-state of route, electric current flows through major flow branch, compared with the hybrid dc circuit breaker of traditional electro-mechanical, due to there is no power electronic devices in major flow branch, route on-state loss is reduced, the cooling equipment of bulky complex in practical engineering applications is eliminated；Using arc voltage forced commutation blow-out, since the current-rising-rate of electronic power switch is high, it passes through Fast mechanical switch electric current and is dropped rapidly to zero, arcing time is reduced to several microseconds, electric arc almost can be ignored the ablation damage of Fast mechanical switch, the service life of Fast mechanical switch is greatly improved, while improving breaking speed, can satisfy requirement of the modern multi-terminal direct current transmission system for breaker.
Description
Technical field:
The present invention relates to a kind of electro-mechanical mixed dc circuit breaker and its control method, arc quenching principle is to utilize electric arc electricity
The quick change of current is pressed, can guarantee that small, high reliablity is lost when state is connected in transmission line of electricity, breaking current ability is strong, speed is fast, belongs to
In power electronics field.
Background technique:
With scientific and technological progress and social development, countries in the world electricity consumption is continuously increased, and traditional thermal power generation not only adds
Acute environmental pollution, also faces the problems such as fossil energy is increasingly exhausted, the fossil energy place of production is regional far from load intensive.Herein
Under background, wind-power electricity generation, optical energy power are attracted widespread attention, wind-powered electricity generation, photovoltaic large-scale application be China " Xi electricity Dong
Send " the extremely important link of engineering.But it is influenced by force majeure such as weather, wind-power electricity generation, optical energy power have randomness
And intermittence, and its place that generates electricity is typically remote from by electric area, and traditional ac transmission mode is difficult to adapt to it to transmission of electricity system
The requirement of system, the appearance of multi-terminal HVDC transmission technology provide a kind of reliable approach to solve this problem.
HVDC Transmission Technology refers to the conveying that electric energy is carried out using stable DC.In HVDC transmission system,
The electric energy that power plant generates first passes through traditional three-phase alternating current mode and is transported to converter station (valve), after converter station (valve) rectification,
It is entered in DC power transmission line in the form of direct current, then is reverse into the shape of three-phase alternating current through converter station (valve) in receiving end
Formula, and backward load power supply.
Compared with traditional UHV AC transmission technique, high voltage dc transmission technology not only can be by generation of electricity by new energy and traditional firepower
Generate electricity wide area interconnection, sufficiently improves the utilization rate of clean energy resource, and can reduce line loss, increases transmission capacity and transmission distance
From, while the stability and synchronism of system can be improved.But the defect of high voltage direct current technology is also quite obvious, due to direct current
Natural zero-crossing point is not present in stream, and the extinguishing of direct-current arc is much more difficult compared to alternating current arc, therefore, high voltage dc transmission technology
One of engineering key application technology is exactly the research and development of high voltage direct current short-circuiting device.As being carried in the stipulated time and cut-off direct current
The switchgear of net normal current and various fault currents, operation, the control of DC grid construction when high voltage DC breaker
With protection basis.
Since high voltage dc transmission technology is in large capacity, remote, low-loss transmission of electricity advantage, in China " Xi electricity Dong
It is send, on national network " important function has been played in strategy.However to be only able to achieve point-to-point dc power defeated for traditional both ends direct current
It send, this mode is difficult to large-scale network-estabilishing, in national grid development strategy, it is desirable that power grid can be realized multiple feed, fall more
Point is by electricity and powers by electric role transforming, in this context, straight based on the multiterminal developed on two-terminal direct current transmission system
Streaming system receives the concern of people.
Multi-terminal direct current transmission system is the high-voltage dc transmission connected between converter station by three or three or more converter stations
Electric line composition.It and AC system there are three or three or more connectivity ports, can be realized multiple power supply points to multiple negative
The power supply of lotus point, more than both ends direct current system economy, flexibility are stronger.Converter station in multi-terminal direct current transmission system can not only be used for
Converting plant operation also can be used as Inverter Station operation, i.e. the power flow direction of the HVDC transmission system of connection converter station can
To change.
Cut-offfing for direct current transportation net mainly cut-offs movement by converter valve exchange side breaker execution to realize at present.It is first
First, this mode cannot quickly shut off fault current, and short circuit current increases rapidly, to bands such as DC power transmission line, converter stations
Carry out immense pressure, damages device；Secondly, which can make entire direct current transportation network out of service, large-area power-cuts is caused
Etc. accidents.In order to guarantee the reliability of transmission line of electricity, the direct current interruption that can satisfy multi-terminal direct current transmission system requirement is developed
Device is most important.
In recent years, with the development of multiterminal element technology, dc circuit breaker is proposed claimed below:
1) dc circuit breaker must be able to quickly remove failure；
2) direct-current short circuit device must adapt to the changeability in Line Flow direction；
3) energy stored in DC line can be consumed rapidly；
4) when cutting off DC current, higher overvoltage and overcurrent are able to bear；
5) there is high connecting-disconnecting function, higher voltage or current class can be cut off；
6) have and repeat connecting-disconnecting function；
7) at low cost, long service life, maintenance cost is low, high reliablity.
The method of cutting DC current is divided into consumption energy and transfer energy from principle.Consumption energy principle is usually used in small
In capacity DC system, according to conservation of energy principle, the energy dissipation of electric arc is increased using physical method.High-capacity direct streaming system
In be difficult to the method realized with the method for consumption energy, therefore transfer energy can only be selected.
Before solid-state switch technology is widely used in dc circuit breaker, served as directly usually using machinery AC circuit breaker
The role of breaker is flowed, therefore to realize breaking direct current it is necessary to artificial manufacture current zero-crossing point.Its implementation is
It will be connected in parallel on mechanical chopper after the capacitor of specified impedance and inductance series connection, and pass through negative group of characteristic of electric arc and capacitor and inductor
Oscillation is to manufacture current zero-crossing point, and this method chooses difficulty in the parameter of capacitor and inductance, and the scope of application is small, cut-offs speed
Slowly.After solid-state switch technology is widely used in dc circuit breaker, turning for route energy is usually realized using solid-state switch
It moves.
Common dc circuit breaker is broadly divided into mechanical dc circuit breaker, all solid state formula dc circuit breaker and electromechanical mixing
Formula dc circuit breaker.Wherein it is excellent to have that carrying current capacity is strong, on-state loss is small and reliability is high etc. for mechanical dc circuit breaker
Point, but there is also disjunction DC current abilities it is poor, the time is long and the service life is short the defects of；All solid state formula dc circuit breaker has disjunction
The advantages that DC current ability is strong, the time is short and can cut-off without arc, but since power electronic element is sealed in electric main by it
Road so that its there are bearing capacitys it is limited, on-state loss is big, reliability is low and the service life is short the defects of；Electro-mechanical mixed direct current is disconnected
The advantages of road device then combines the above two has many advantages, such as that disjunction DC current ability is strong, the time is short, long working life.
Electro-mechanical mixed dc circuit breaker common at present, which is mostly used, connects mechanical switch with a small amount of electronic power switch
Topological structure, the breaker of this topological structure has the advantage that no arc, which may be implemented, to be cut-off, and machinery is greatly improved
The working life of switch；Quick action, breaker actuation time depend on the actuation time of mechanical switch.But its defect also phase
When obvious: when due to route on-state electric current pass through with the concatenated solid-state switch valve group of mechanical switch, cause its fever serious, in work
The cooling equipment that bulky complex is generally required in journey practical application is used cooperatively；Due to this some electrical power electronic switch be with it is defeated
Electric line is concatenated relationship, and the reliability and stability of entire transmission system is caused to reduce；Transmission line of electricity solid-state is connected on to open
It is limited that pass valve group holds current-carrying ability, and the short circuit current in DC transmission system is very big, needs to match with current limiter in engineering
It closes and uses, increase system complexity, lead to the reduction of its reliability；When the direction of tide of direct current transportation network inverts
When, the high voltage at bus end is subjected in the state of disconnection with the concatenated solid-state switch valve group of mechanical switch, therefore, it is difficult to
Adapt to the requirement of modern multi-terminal HVDC transmission network.
Summary of the invention:
The present invention provides a kind of electro-mechanical mixed dc circuit breaker and its control methods, to overcome the above-mentioned prior art
It is insufficient.
The technical solution that this is invented in fact is as follows:
One aspect of the present invention provides a kind of electro-mechanical mixed dc circuit breaker, it is characterised in that: including major flow branch,
Stop branch and change of current branch.
The major flow branch includes three concatenated Fast mechanical switch, wherein intermediate Fast mechanical switch is
Auxiliary mechanical switch, two sides are main mechanical switch；Auxiliary mechanical switch in the change of current branch and major flow branch
It is in parallel；The cutout branch and major flow branch circuit parallel connection.
The auxiliary mechanical switch is used to generate electric arc when breaker disconnects, and arc voltage compels to flow through auxiliary machine tool
The current commutation of switch is into change of current branch.The main mechanical switch is for being isolated bus in the case where breaker is in gate-dividing state
The high voltage at end prevents electronic power switch in change of current branch from damaging, while meeting MTDC transmission system to trend amphicheirality's
It is required that.
The major flow branch carries line current when in the conductive state for route.
Further, the change of current branch includes an electronic power switch and a bridge rectifier；The electricity
Power electronic switch rectifies in parallel with auxiliary mechanical switch by bridge circuit；The bridge rectifier meets multiterminal element
The requirement of the trend amphicheirality of transmission line of electricity；The electronic power switch includes insulated gate bipolar transistor IGBT.It is described
Change of current branch for quickly extinguishing electric arc and current commutation of major flow branch will be flowed through to cutout branch or vice versa.
Further, the cutout branch includes multiple electronic power switches, a metal oxide arrester and one
Bridge rectifier；The electronic power switch is rectified by bridge circuit；The bridge rectifier meets multiterminal
The requirement of the trend amphicheirality of DC power transmission line；The electronic power switch includes insulated gate bipolar transistor IGBT；
It is in parallel with metal oxide arrester after the IGBT plural serial stage；The main cutout branch is used for the transfer of electric current, opens
Dump energy in disconnected and absorption circuit.
Another aspect provides a kind of control methods of electro-mechanical mixed dc circuit breaker, including walk as follows
It is rapid:
1) making process: before combined floodgate, all switches are in off-state；After receiving combined floodgate order, conducting cutout branch
All electronic power switches, electric current from bus end through stop branch flow to load end；Branch current to be stopped reaches stable
After value, it is closed main mechanical switch；It is then turned on the electronic power switch of change of current branch, simultaneously turns off all electricity of cutout branch
Power electronic switch；After the electric current complete change of current to change of current branch, it is closed auxiliary mechanical switch；To auxiliary mechanical switch in-place closing
Afterwards, the electronic power switch of change of current branch is short-circuited, and electric current closes a floodgate and completes completely by the change of current into major flow branch.
2) separating brake process: before separating brake, main mechanical switch and auxiliary mechanical switch are in closed state, the electricity of change of current branch
Power electronic switch has applied trigger signal；After receiving separating brake order, all electronic power switches of conducting cutout branch, simultaneously
Auxiliary mechanical switch disconnect, generate electric arc, arc voltage force electric current by the change of current to change of current branch and cutout branch in, due to changing
The electronic power switch electric current rate of climb is very fast in stream branch, and the electric current for flowing through auxiliary mechanical switch is dropped rapidly to 0, electric arc
Quickly extinguished；After auxiliary mechanical switch separating brake in place after, turn off change of current branch all electronic power switches；It is complete to electric current
After the change of current to cutout branch, main mechanical switch is disconnected；After main mechanical switch separating brake in place after, disconnect cutout branch in it is all
Electronic power switch, after voltage rises to certain threshold value, metal oxide arrester is switched on, the residual energy in absorbing circuit
Amount, separating brake are completed.
Compared with the existing technology, a kind of electro-mechanical mixed dc circuit breaker proposed by the present invention has the effect that
Since power electronic devices being not present in major flow branch, under route on state, breaker not will cause electricity
It can be lost, heat dissipation equipment need not be increased additionally in practical engineering applications to guarantee to be safely operated；Auxiliary mechanical switch two sides are equal
Connected main mechanical switch, the high voltage from bus end can be isolated in breaker open operation, avoid in change of current branch due to
Electronic power switch serial number lacks the low and impaired situation of stress levels, meets the requirement of multi-terminal direct current transmission system；
By with power electronic devices is not present in major flow branch, reliability and the serious forgiveness of breaker significantly improve；In change of current branch
Insulated gate bipolar transistor IGBT series connection number is few, the arc voltage generated in auxiliary mechanical switch can be limited in IGBT
The level of saturation conduction pressure drop, while cooperating IGBT current carrying density greatly and fireballing characteristic is connected, it realizes fast arc extinction, improves
The service life of auxiliary mechanical switch.
Detailed description of the invention:
Fig. 1 is a kind of principle assumption diagram of electro-mechanical mixed dc circuit breaker of the present invention；
In figure: 1- major flow branch；2- change of current branch；3- cutout branch；4- main mechanical switch；5- auxiliary mechanical switch；
6- insulated gate bipolar thyristor IGBT；7- metal oxide arrester.
Specific embodiment:
Embodiments of the present invention are described below in detail, the example of the embodiment is shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and for explaining only the invention, and is not construed as limiting the claims.
This technology technical field personnel are appreciated that unless expressly stated, singular " one " used herein, " one
It is a ", " described " and "the" may also comprise plural form.It is to be further understood that being arranged used in specification of the invention
Diction " comprising " refer to that there are the feature, integer, step, operation, element and/or component, but it is not excluded that in the presence of or addition
Other one or more features, integer, step, operation, element, component and/or their group.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (including technology art
Language and scientific term) there is meaning identical with the general understanding of those of ordinary skill in fields of the present invention.Should also
Understand, those terms such as defined in the general dictionary, which should be understood that, to be had and the meaning in the context of the prior art
The consistent meaning of justice, and unless defined as here, it will not be explained in an idealized or overly formal meaning.
In order to facilitate understanding of embodiments of the present invention, further by taking specific embodiment as an example below in conjunction with attached drawing to be solved
Release explanation.
Embodiment
Such as Fig. 1, electro-mechanical mixed dc circuit breaker includes: major flow branch, cutout branch and changes in the embodiment of the present invention
Flow branch.Wherein, the major flow branch includes three concatenated Fast mechanical switch, wherein intermediate to open for auxiliary machinery
It closes, other two is main mechanical switch；Main mechanical switch is used to be isolated when breaker is in gate-dividing state from bus end
High voltage prevents solid-state switch valve group in change of current branch from damaging because stress levels are lower；Major flow branch is in for route
Line current is carried when on state.
The change of current branch includes an electronic power switch and a bridge rectifier；The power electronics is opened
It closes in parallel with auxiliary mechanical switch by bridge circuit rectification；The bridge rectifier meets multi-terminal HVDC transmission route
Trend amphicheirality requirement；The electronic power switch includes insulated gate bipolar transistor IGBT.The change of current branch
Current commutation extremely cutout branch or vice versa of the road for quickly extinguishing electric arc and major flow branch being flowed through.
The cutout branch includes multiple electronic power switches, a metal oxide arrester and a bridge rectifier
Circuit；The electronic power switch is rectified by bridge circuit；The bridge rectifier meets multi-terminal HVDC transmission
The requirement of the trend amphicheirality of route；The electronic power switch includes insulated gate bipolar transistor IGBT；Described
It is in parallel with metal oxide arrester after IGBT plural serial stage.The main cutout branch is used for the transfer of electric current, cut-offs and inhale
Dump energy in take-up road.
On the other hand, the present invention provides a kind of control method of electro-mechanical mixed dc circuit breaker, include the following steps:
1) making process: before combined floodgate, all switches are in off-state；After receiving combined floodgate order, conducting cutout branch
All electronic power switches, electric current from bus end through stop branch flow to load end；Branch current to be stopped reaches stable
After value, it is closed main mechanical switch；It is then turned on the electronic power switch of change of current branch, simultaneously turns off all electricity of cutout branch
Power electronic switch；After the electric current complete change of current to change of current branch, it is closed auxiliary mechanical switch；To auxiliary mechanical switch in-place closing
Afterwards, the electronic power switch of change of current branch is short-circuited, and electric current closes a floodgate and completes completely by the change of current into major flow branch.
2) separating brake process: before separating brake, main mechanical switch and auxiliary mechanical switch are in closed state, the electricity of change of current branch
Power electronic switch has applied trigger signal；After receiving separating brake order, all electronic power switches of conducting cutout branch, simultaneously
Auxiliary mechanical switch disconnect, generate electric arc, arc voltage force electric current by the change of current to change of current branch and cutout branch in, due to changing
The electronic power switch electric current rate of climb is very fast in stream branch, and the electric current for flowing through auxiliary mechanical switch is dropped rapidly to 0, electric arc
Quickly extinguished；After auxiliary mechanical switch separating brake in place after, turn off change of current branch all electronic power switches；It is complete to electric current
After the change of current to cutout branch, main mechanical switch is disconnected；After main mechanical switch separating brake in place after, disconnect cutout branch in it is all
Electronic power switch, after voltage rises to certain threshold value, metal oxide arrester is switched on, the residual energy in absorbing circuit
Amount, separating brake are completed.
As can be seen from the above description, electro-mechanical mixed dc circuit breaker of the invention, due to being not present in major flow branch
Power electronic devices, under route on state, breaker not will cause electric energy loss, in practical engineering applications need not be additional
Increase heat dissipation equipment to guarantee to be safely operated；Main mechanical switch can isolate the high voltage from different directions, and it is straight to meet multiterminal
Galvanic electricity net is to the polar requirement of breaker；By in major flow branch be not present power electronic devices, the reliability of breaker with
Serious forgiveness significantly improves；Insulated gate bipolar transistor IGBT series connection number is few in change of current branch, can be by auxiliary mechanical switch
The arc voltage of middle generation is limited in the level of IGBT saturation conduction pressure drop, while cooperating IGBT current carrying density greatly and conducting speed
Fast characteristic realizes fast arc extinction, improves the service life of auxiliary mechanical switch.
Claims (6)
1. a kind of electro-mechanical mixed dc circuit breaker of limiting short-circuit current, it is characterised in that: including major flow branch, change of current branch
Road and cutout branch；Wherein, the major flow branch includes three concatenated Fast mechanical switch, wherein two are host
Tool switch, another is auxiliary mechanical switch；The change of current branch is in parallel with the auxiliary mechanical switch in major flow branch；Institute
The cutout branch and major flow branch circuit parallel connection stated.
2. major flow branch according to claim 1 includes three concatenated Fast mechanical switch, wherein intermediate is quick
Mechanical switch is auxiliary mechanical switch, and for generating electric arc, the current direction that arc voltage compels to flow through auxiliary mechanical switch is changed
Flow branch；The Fast mechanical switch of two sides is main mechanical switch, comes from bus for bearing when breaker is in disjunction state
The high voltage at end, to prevent the electronic power switch in high voltage damage change of current branch；The major flow branch is used for line
Line current is carried when road is in the conductive state.
3. electro-mechanical mixed dc circuit breaker according to claim 1, it is characterised in that: the change of current branch includes one
A electronic power switch and a bridge rectifier；The electronic power switch after bridge circuit rectifies with auxiliary machine
Tool switch in parallel；The bridge rectifier meets the requirement of the trend amphicheirality of multi-terminal HVDC transmission route；Described
Electronic power switch includes insulated gate bipolar transistor IGBT.
4. change of current branch according to claim 3 is for quickly extinguishing electric arc and flowing through the current commutation of major flow branch
To the branch or vice versa that stops.
5. electro-mechanical mixed dc circuit breaker according to claim 1, it is characterised in that: the cutout branch includes more
A electronic power switch, a metal oxide arrester and a bridge rectifier；The electronic power switch passes through
Bridge circuit rectification；The bridge rectifier meets the requirement of the trend amphicheirality of multi-terminal HVDC transmission route；It is described
Electronic power switch include insulated gate bipolar transistor IGBT；It is lightning-arrest with metal oxide after the IGBT plural serial stage
Device is in parallel；The main cutout branch is used for the transfer of electric current, cut-offs and the dump energy in absorption circuit.
6. a kind of control method of the described in any item breakers of claim 1-5, which comprises the steps of:
1) making process: before combined floodgate, all switches are in off-state；After receiving combined floodgate order, the institute of conducting cutout branch
Some electronic power switches, electric current flow to load end through cutout branch from bus end；After the branch current that stops reaches stationary value,
It is closed main mechanical switch；It is then turned on the electronic power switch of change of current branch, simultaneously turns off all electric power electricity of cutout branch
Sub switch；After the electric current complete change of current to change of current branch, it is closed auxiliary mechanical switch；After auxiliary mechanical switch in-place closing,
The electronic power switch of change of current branch is short-circuited, and electric current closes a floodgate and completes completely by the change of current into major flow branch；
2) separating brake process: before separating brake, main mechanical switch and auxiliary mechanical switch are in closed state, the electric power electricity of change of current branch
Sub switch has applied trigger signal；After receiving separating brake order, all electronic power switches of conducting cutout branch assist simultaneously
Mechanical switch disconnect, generate electric arc, arc voltage force electric current by the change of current to change of current branch and cutout branch in, due to change of current branch
The electronic power switch electric current rate of climb is very fast in road, and the electric current for flowing through auxiliary mechanical switch is dropped rapidly to 0, and electric arc is fast
Speed is extinguished；After auxiliary mechanical switch separating brake in place after, turn off change of current branch all electronic power switches；It is changed completely to electric current
After flowing to cutout branch, main mechanical switch is disconnected；After main mechanical switch separating brake in place after, disconnect all electric power in cutout branch
Electronic switch, after voltage rises to certain threshold value, metal oxide arrester is switched on, the dump energy in absorbing circuit, point
Lock is completed.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111211543A (en) * | 2020-01-19 | 2020-05-29 | 国网江苏省电力有限公司电力科学研究院 | Fusing type direct current breaker and control method thereof |
| CN111740398A (en) * | 2020-05-08 | 2020-10-02 | 许继集团有限公司 | Bidirectional controllable lightning arrester and control method thereof |
| CN112751323A (en) * | 2019-10-31 | 2021-05-04 | 西安西电高压开关有限责任公司 | Direct current breaker control method and direct current breaker |
| CN112865516A (en) * | 2021-02-26 | 2021-05-28 | 华北电力大学 | Active resonance type direct current change-over switch and control method thereof |
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| CN112751323A (en) * | 2019-10-31 | 2021-05-04 | 西安西电高压开关有限责任公司 | Direct current breaker control method and direct current breaker |
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| CN111740398A (en) * | 2020-05-08 | 2020-10-02 | 许继集团有限公司 | Bidirectional controllable lightning arrester and control method thereof |
| CN112865516A (en) * | 2021-02-26 | 2021-05-28 | 华北电力大学 | Active resonance type direct current change-over switch and control method thereof |
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